So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Khan, Shafiq A.; Plieninger, Hans researched the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ).Application In Synthesis of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate.They published the article 《Synthesis of a tripyrrin-14-carboxylic acid with two neopentyl groups》 about this compound( cas:2199-44-2 ) in Chemische Berichte. Keywords: tripyrrincarboxylic acid; metal complex tripyrrincarboxylic acid. We’ll tell you more about this compound (cas:2199-44-2).
Tripyrrincarboxylic acid I was prepared from pyrrole II by condensation with Me3CCHO and HI to give iodo derivative III which was reduced to IV. SO2Cl2 reacted with IV to give V, which was hydrolyzed to aldehydic acid VI. This condensed with 3,4-dimethyl-3-pyrrolin-2-one to pyrromethenone VII, which was decarboxylated to VIII. VI condensed with VIII to give I. Metal complexes of I are soluble in most organic solvents even after crystallization
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com